https://bugs.webkit.org/show_bug.cgi?id=50744

Reviewed by Martin Robinson.

Source/WebKit/gtk:

* GNUmakefile.am:
* WebCoreSupport/InspectorClientGtk.cpp:
(WebKit::InspectorClient::releaseFrontendPage): also let go of the
frontend client when releasing the frontend page;
(WebKit::InspectorFrontendClient::~InspectorFrontendClient(): Call releaseFrontendPage()
like other ports do instead of just disconnectFrontendClient().
(WebKit::InspectorFrontendClient::destroyInspectorWindow): Use GRefPtr for the
inspector ref.
(WebKit::InspectorFrontendClient::bringToFront): Adjust for GRefPtr usage.
(WebKit::InspectorFrontendClient::attachWindow): Ditto.
(WebKit::InspectorFrontendClient::detachWindow): Ditto.
(WebKit::InspectorFrontendClient::inspectedURLChanged): Ditto.
* WebCoreSupport/InspectorClientGtk.h:
(InspectorFrontendClient): Use GRefPtr for inspector member.
* tests/testwebinspector.c: Added. Test that killing a WebView with the inspector
open does not crash, and that closing and reinspecting works.
(quitLoop):
(consoleMessageCallback):
(inspectElementCallback):
(closeInspector):
(showInspector):
(test_webkit_web_inspector_close_and_inspect):
(test_webkit_web_inspector_destroy_inspected_web_view):
(main):

LayoutTests:

* platform/gtk/Skipped: unskip inspector/debugger/open-close-open.html,
which now passes.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106831 268f45cc-cd09-0410-ab3c-d52691b4dbfc